The watchman shows the ghost of Hamlet's father to Horatio. The ghost reveals to Hamlet that he was murdered by his brother Claudius, who is now the King of Denmark. Hamlet later confronts Claudius and enacts a play mimicking the murder, causing Claudius to react suspiciously. Hamlet also accidentally kills Polonius, driving Ophelia mad with grief until she drowns. Hamlet and Laertes later duel, and both end up dying from poison, along with Queen Gertrude and Claudius.